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36篇 您的检索式:作者名="Liu Wenchang"
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1The Yanshanian Granites and Associated Mo-Polymetallic Mineralization in the Xiangcheng-Luoji Area of the Sanjiang-Yangtze Conjunction Zone in Southwest China显示文摘The Xiangcheng-Luoji area is located in the conjunction of the southern part of the 'Sanjiang' mineralization belt and the west margin of Yangtze craton. The geological studies were carried out to know the Indosinian large porphyry Cu polymetallic deposits. Recent studies revealed that the area existed in the superposition of Late Yanshanian acidic intrusive rock belt and developed Mo-Cu polymetallic mineralization where promising exploration results have been achieved. Through the systematic study of geochronology, formation age of the Renlin Mo-minieralization monzogranite is 81.7±1.1 Ma. Re-Os dating results concentrate on 82.34±1.2–88.27±1.23 Ma for the model ages of molbdenite of Tongchanggou Mo deposits, average age is 85 ± 2 Ma where seven data points constitute a good isochron which shows that they were the same period products of mineralization. Geochemical features shown that the rocks have a high content of SiO 2(66.59–77.36wt%), alkaline-rich(K2O=2.68–6.08wt%; Na2O=0.50–4.91wt%; K2O/Na2 O ratios are 0.71–5.56, where average ratio of 1.89) and have aluminum–rich features(Al2O3 10.38–15.15wt%) with σ values less than 3.3. Which indicate that they belong to the high-K calc-alkali to shoshonite series. Geochemistry of Yanshanian intrusions shows that rocks are enrich in LREE with obvious negative δEu anomalies, enrichment of trace elements like, LILE elements(Rb, Th, Ba) with a relative loss of Ba, and loss of high field strength elements(Nb, Ta, P, Ti) and HREE elements. The granite genetic classification diagram shows that the granites belong to A-type granite and formatted in syn-collision tectonic environment. Meanwhile, the Yanshanian granites also inherited the characteristics of island arc environment which formed in the process of crustal melting caused by upwelling of asthenospheric substances in the extensional tectonic background. The process of partial melting existed substances from the deep(lower crust or upper mantle) which have been added. In the Xiangcheng-Luoji area, monzogranite and granodiorite porphyry bodies are widely developed Mo polymetallic mineralization, the deep porphyry mineralization have great potential for geological prospecting.LI Wenchang YIN Guanghou YU Haijun LIU Xuelong 2014Acta Geologica Sinica(English Edition)2014,88,6:20
2Minimum geometric power distortionless response beamforming against heavy-tailed noise of unknown statistics显示文摘A minimum geometric power distortionless response beamforming approach against impulsive noise(including all αstable noise) of unknown statistics is proposed.Due to that definite logarithmic moments require no priori knowledge of impulsive noise,this new beamformer substitutes the logarithmic moments for the second-order moments and iteratively minimizes the 'geometric power' of the beamformer's output snapshots,subjected to a linear constraint.Therefore,the proposed beamformer can provide significantly higher output geometric signal-to-noise-andinterference ratio.Moreover,the optimum weight vector is obtained by using a new iteration process.The simulation results prove that the new method is effective.Wenchang Wang Lei Li Chunjing Liu Feng Liu 2011Journal of Systems Engineering and Electronics2011,22,5:3
3Formation and evolution of the tertiary carbonate reefs in the Madura Strait Basin of Indonesia显示文摘Analysis of 2 D seismic data over 4 500 km in length from the Madura Strait Basin in the East Java Sea reveals seismic re?ection characteristics of reefs and associated sedimentary bodies, including asymmetrical or symmetrical dome re?ections, slope progradational re?ections, chaotic re?ections and discontinuous strong re?ections inside the reef, which onlap the ?ank of the reef. It is concluded that the developmental paleo-environment of most reefs is mainly conducive to shallow marine carbonate platform facies and platform margin facies, based on well core data, variations in seismic facies and strata thickness.The formation and evolution of all reefs are primarily in?uenced by the tectonic framework of the Madura Strait Basin. Platform margin reefs are principally controlled by two types of structures: one is a series of E-W trending Paleogene normal faults, and the other is an E-W trending Neogene inversion structures. In addition, wave actions, tidal currents and other ocean currents play an accelerated role in sorting, rounding and redeposition for the accumulation and evolution of reefs. Tertiary reefs in the MSB can be divided into four types: 1) an open platform coral reef of Late Oligocene to Early Miocene, 2) a platform margin coral reef controlled by normal faults in Late Oligocene to Early Miocene, 3) a platform margin Globigerina moundreef controlled by a 'hidden' inversion structure in Early Pliocene, and 4) a platform margin Globigerina mound-reef controlled by thrust faults in the early Pliocene. Patterns of the formation and evolution of reefs are also suggested.RAN Weimin LUAN Xiwu LU Yintao LIU Hong YANG Jiajia ZHAO Yang HE Wenchang YAN Zhonghui 2019Journal of Oceanology and Limnology2019,37,1:3
4The Late Cretaceous Crustal Magmatism of the Geza Arc Metallogenic Belt in Yunnan Province,and Zircon Ages and Hf Isotopic Evidence of the Porphyry Cu-Mo Mineralization显示文摘Objective The Geza arc in Yunnan Province,located in the southern Yidun arc,is an important part of the Sanjiang tectonic-magmatic belts in southwestern China and is a newly discovered copper polymetallic ore-concentrating district.Recent studies show that the newly discovered Yanshanian porphyry Cu-Mo polymetallic mineralization superimposed in the Indosinian porphyry copper beltYANG Fucheng LI Wenchang LIU Xuelong WANG Shuaishuai 2017Acta Geologica Sinica(English Edition)2017,91,1:2
5Development of processing maps for a Ni-based superalloy 显示文摘Cai Dayong Xiong Liangyin Liu Wenchang 2007Materials C haracterization2007,58,:1
6Donor-acceptor polymers for advanced memory device applications显示文摘Liu Chengliang Chen Wenchang 2011Polym Chem2011,2,17:1
7Fall Detection with the Support Vector Machine During Scripted and Continuous Unscripted Activities显示文摘Liu Shing-hong Cheng Wenchang 2012Sensors2012,12,12:1
8Comparative study of big data of global adakites and mineralization-related granite in the Geza arc metallogenic belt, northwest Yunnan, Southwest China显示文摘The Geza arc is an important part of the Sanjiang tectono-magmatic belt and is a newly discovered copper polymetallic ore concentration area in northwest Yunnan province,Southwest China.The area comprises numerous metal ore deposits,including one super-largedeposit,three large deposits,etc.The formation of these deposits was closely related to intermediate–acidic magmatic intrusions.Based on previous studies,the“big data”analysis technique was used for a comparative study of large geochemical datasets of granite related to ore-formation in the Geza porphyry copper deposit and global adakites.As a result,1313 element combinations and 127,765 overlap ratios were obtained.The results show that the Geza porphyry has similar geochemical characteristics to global adakites(the ratios of REE and Ga to major elements are in the range of global adakites).However,theCu,Mo,and Zn contents of the porphyry are significantly higher than those of global adakites,and the porphyry may,therefore,represent an end-member of the global range of adakite composition.In addition,the geochemistry of adakites associated with the porphyry copper deposits overlaps in part with that of global adakites,although most of the data lie outside of the range of global adakites(i.e.lowMn/Cu,Sr/Cu,Na/Cu,and Zr/Cu values,and high Th/Cu,Ba/Cu,Na/Mo,Rb/Mo,Th/Mo,Ta/Mo,Ba/Mo,Mn/Zn,and Ba/Znvalues).The samples with characteristics that deviate significantly from the geochemistry of global adakites show more advanced mineralization and alteration,and a stronger relationship with Cu and Momineralization.The results of geochemical data mining can be used as a prospecting indicator,and provide a new scientific basis for geological prospecting of the deep levels and per-iphery of the Geza Cu polymetallic ore belt.Liu Xuelong Li Wenchang Zhang Qi Zhang Na Zhang Changzhen Luo Ying Wang Shuaishuai Yang Fucheng Chen Jianhang Li Zhenhuan 2018Big Earth Data2018,2,3:1
9Preparation of carboxylmethylchitosan and alginate blend membrane for diffusion-controlled release of diclofenac diethylamine显示文摘Controlled drug release technology is becoming a commercially sound methodology of administering pharmaceutical therapies,and it is important to predict and control the release kinetics to fully take advantage of this technology.Carboxylmethylchitosan(CMCS)and alginate(SA)blend membranes were successfully prepared by solution casting technique and exposing to acetic acid atmosphere,which induced the protonation of the amino groups of CMCS,and the formation of polyelectrolyte composite hydrogels.By using diclofenac diethylamine as the model drug,the diffusion controlled drug release behaviors of the membranes were studied based on permeation experiment,which indicated that the swelling rates of the membranes could be adjusted by simply changing the weight ratio of CMCS/SA and effectively changed the release rate of the membrane.The study shows that CMCS/SA blend membranes are promising biomaterials used for modulating the permeation behavior and developing advanced drug delivery systems.Xiaoxue Yuan Ran Liu Wenchang Zhang Xiaoqiang Song Lei Xu Yan Zhao Lei Shang Jingsong Zhang 2021Journal of Materials Science & Technology2021,,4:1
10Supramolecufar block copoIymers: Graphene oxide composites for memo ry device applieations显示文摘Yu An Dih Liu Chengliang Chen Wenchang 2012Chem Commun2012,48,3:1
11Post-ore Modification and Preservation of the Indosinian Porphyry Copper Deposit in Geza Arc, Yunnan, SW China显示文摘Objective The post-ore modification and preservation of porphyry copper deposits is controlled and influenced by various geological processes,and the regional uplift and denudation is the most important factors.This studyLIU Xuelong LI Wenchang ZHANG Na LAI Anqi LI Zhe 2016Acta Geologica Sinica(English Edition)2016,90,2:1
12Characterization of hot deformation behavior of a Ni-base superalloy using processing map显示文摘Cai Dayong Xiong Liangyin Liu Wenchang 2009Materials and Design2009,30,3:1
13New random copolymers with pendant carbazole donor and 1,3,4-oxadi- azole aeceptor for high performance memory device applieations显示文摘Fang Yikai Liu Chengliang Chen Wenchang 2011J Mater Chem2011,21,13:1
14Hepatic arterial infusion of oxaliplatin plus raltitrexed in unresectable hepatocellular carcinoma with or without portal vein tumour thrombosis显示文摘Background Unresectable hepatocellular carcinoma(HCC)has a poor prognosis.According to the HCC management guidelines in China,the standard treatment of Barcelona Clinic Liver Cancer(BCLC)stage B or C HCC with portal vein tumour thrombosis(PVTT)is chemoembolization.However,some patients with BCLC stage B or C HCC with PVTT respond poorly to chemoembolization.We aimed to compare tumour responses and survival benefits between patients with unresectable HCC with or without PVTT.Methods We reviewed 119 consecutive patients with unresectable HCC with PVTT(n=67)and without PVTT(n=52)who underwent hepatic arterial infusion of oxaliplatin plus raltitrexed between January 2018 and April 2021.Overall survival,progression-free survival,tumour responses,and adverse events were compared between the groups.Results There were no significant between-group differences in the objective response rates and median progression-free survival.The median overall survival was significantly longer in the group without PVTT than in that with PVTT(17.0 vs 10.4 months,respectively;P=0.024).Conclusion Hepatic arterial infusion of oxaliplatin plus raltitrexed may be efficacious in patients with unresectable HCC with or without PVTT.Shiguang Chen Wenchang Yu Kongzhi Zhang Weifu Liu Xiaolong Wang Chuanben Chen 2022Gastroenterology Report2022,10,1:1
15Niobium segregation in I nconel 718 显示文摘Liu Wenchang Yao Mei Chen Zhonglin 1997Journal of Materials Science1997,10,:1
16Regio- and dim stereoselective conjugate addition of Grignard reagents to ar- yl substituted a, 显示文摘Cao Xiufang Liu Fang Lu Wenchang 2008Tetrahedron2008,64,24:1
172,2-Diphenyl- 1 -picryldrazylRadical-Scavenging Active Components from Adlay Hulls显示文摘CHING-CHUAN KUO WENCHANG CHIANG GURY-PING LIU 2002Journal of Agricultural and Food Chemistry Life Sciences2002,,50:1
18An institutional analysis of the new product development process of small and medium enterprises (SMEs) in China, Hong Kong and Taiwan显示文摘Wai - sum Siu Tingling Lin Wenchang Fang Zhi Chao Liu 2006Indus- trial Marketing Management2006,35,3:1
19Quantitative phase analysis of Inconel 718 by X-ray diffraction 显示文摘Liu Wenchang Xiao Furen Yao Mei 1997Journal of Materials Science Letters1997,16,:1
20Enhanced hydrothermal stability of Cu-SAPO-34 with an ultrathin TiO_(2)coated by atomic layer deposition for NH3-SCR显示文摘Reducing pollution and carbon emissions is an important step toward peaking CO_(2)emissions before 2030 and reaching carbon neutrality before 2060,and heavy diesel vehicle pollution,particularly nitrogen oxides(NOx)emissions,is an essential part.CuSAPO-34 is a CHA-type small pore molecular sieve with excellent ammonia(NH_(3))selective catalytic reduction(NH_(3)-SCR)catalytic activity,but it cannot be stored or applied because of severe degradation caused by low-temperature hydrothermal aging.To improve the hydrothermal stability,TiO_(2)was coated on the surface of Cu-SAPO-34 by the ALD method to form a uniform nanolayer.Though this ultrathin TiO_(2)nanolayer has little effect on NH_(3)-SCR catalytic activity of Cu-SAPO-34,the resistance to low-temperature hydrothermal aging in liquid water at 80℃for 24 h has greatly been improved.A study carried out by SEM,XRD,NH_(3)-TPD,and EPR,showed that the ultra-thin TiO_(2)nanolayers were covered uniformly and hydrolysis of frameworks silicon and the migration of Cu^(2+)was retarded.This method has some implications for the future preparation of highly robust Cu-SAPO-34 catalysts for industrial applications.This research could inspire the development of highly robust CuSAPO-34 catalysts to control the NOx emissions from diesel engines.TIAN HeYuan XI WenChang ZHANG YiBo SUN LiWei LIU Peng WU Fan YANG Guo GUO Feng YANG XiangGuang 2022Science China(Technological Sciences)2022,65,10:1
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